en.Wedoany.com Reported - On June 8, the Ningxia Baofeng PP Unit Project of Shaanxi Huajian Hoisting and Transportation Company reached another critical milestone, as the 400-ton No.1 Loop Reactor was successfully modularly hoisted and precisely positioned. This operation marked the company's first integral modular hoisting of a loop reactor, overcoming multiple technical challenges and achieving a new breakthrough in large equipment hoisting technology.
It is reported that the Ningxia Baofeng PP Unit is equipped with two loop reactors. The No.1 equipment hoisted this time weighs a total of 400 tons, with its main body consisting of four 48-meter-long legs and a top elbow forming a 51-meter-long rectangular frame structure, assembled as a whole through steel sections. This hoisting involved the integral assembly of the four legs into a single modular unit for lifting. The greatest challenge was the arrangement of lifting points and structural stability control. The leg pipe diameter of the equipment is only 0.8 meters, with a wall thickness of 18 millimeters. The thin cylindrical structure and limited load-bearing capacity prevented the use of the conventional dual-lug hoisting method. To ensure safe and controllable hoisting, the project's hoisting technical team conducted specialized research, optimizing the lifting lug structure and placement positions. The main lifting lugs were set in the area of the external support beams on the equipment's side, and the stressed areas of the cylinder wall were reinforced and strengthened. Simultaneously, through finite element simulation analysis, the overall stress, hoisting stability, and deformation parameters of the equipment were comprehensively verified, precisely finalizing the specialized hoisting plan.
According to reports, the on-site construction adopted the single-main-crane lifting and delivery method, i.e., a dual-crane cooperative operation mode with a 1250-ton crawler crane as the main lift and a 450-ton crawler crane for tail lifting. The hoisting process was smooth and orderly, with personnel at all positions closely cooperating and operating according to specifications. The entire operation, including lifting, leveling, rotation, and precise positioning, was completed in one go, successfully fulfilling the hoisting task.
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